JPH0310089Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a roll stopper structure for an engine.

Conventionally, in known transverse engine vehicles, a roll stopper is provided to prevent the engine from rolling significantly due to engine torque reaction force and colliding with the walls, piping, and auxiliary equipment of the engine room. It had a structure in which an arm extending from the engine was brought into contact with a bracket provided on the vehicle body.

However, when the arm collides with the bracket, a large impact force is applied to the vehicle body, resulting in poor ride comfort.Also, if the rubber of the engine mount is made soft to absorb minute vibrations generated by the engine during steady operation, the torque is relatively small. The above-mentioned impact force was applied to the car body as a reaction force, making the ride more comfortable.

The present invention was proposed in view of the above circumstances, and consists of a partition plate that is fixed to one side of the engine or the vehicle body and partitions the elastic liquid chamber into two, and a partition plate that divides the elastic liquid chamber into two parts formed on both sides of the partition plate. In an engine roll stopper structure having a wall opposite to the partition plate and a mounting portion that fixes the wall opposite to the engine or the other side of the vehicle body, an orifice that constantly communicates the two liquid chambers, and a an orifice valve rotatable around its own axis between a first position communicating the chambers and a second position cutting off the communication; and an orifice valve integrally attached to the partition plate and accelerating the orifice valve. The gist of this invention is a roll stopper structure for an engine characterized by having a rotary solenoid mechanism that rotates directly when the pedal depression or return speed exceeds a predetermined value.

An embodiment of the present invention will be explained with reference to the drawings.
Fig. 1 is a plan view of an engine room in which an embodiment of the device is installed, Fig. 2 is a front view of Fig. 1, Fig. 3 is a vertical sectional view of the above embodiment, and Fig. 4 is a plan view of Fig. 3. Figure 5 is a horizontal sectional view showing the rotary valve in Figure 3, Figure 6 is a cross sectional view taken along - in Figure 5, and Figure 7 shows the relationship between the deflection and load of the rubber chamber in Figure 3. It is a spring characteristic diagram showing the relationship.

As shown in Figures 1 and 2, the engine
is arranged extending in the vehicle width direction on the frame Frm in the engine room, and is elastically supported on the frame Frm by the left mount Lmt and the transmission mount Mmt.

The engine roll stopper consists of a front roll stopper Frs installed in front of the engine Eng and a rear roll stopper Rrs installed behind the engine.

Front and rear roll stopper Frs,
Rrs (hereinafter referred to as roll stopper 1), as shown in FIGS. 3 to 7, partitions the inside of roll stopper 1 into upper and lower oil chambers 5 and 6 by a partition disk 4, and connects partition disk 4 to frame Frm. An arm member 22 is attached to the walls of the upper and lower oil chambers 5 and 6 facing the engine 4, and the mounting screws 2 and 3 are attached to the engine Eng.
(See Figures 1 and 2). 7 and 8 cooperate with the partition disk 4 to form an upper oil chamber 5 and a lower oil chamber 6, respectively, and also include an upper rubber chamber and a lower rubber chamber in which the bases of the mounting screws 2 and 3 are embedded, respectively, at the upper and lower ends. , 9 is a rotary valve insertion hole consisting of a large diameter hole diametrically penetrated through the partition disk 4 and a small diameter hole coaxial with this, and 10 is a large diameter hole of the rotary valve insertion hole 9, where the large diameter portion with a pointed tip is the large diameter hole of the rotary valve insertion hole 9. The rotary valve is a rotary valve in which the small diameter part is slidably inserted into the small diameter hole, and the large diameter part has a communication hole 11 with a long cross section having a large cross section diametrically, and the outer end of the small diameter part has a communicating hole 11 with a long cross section. is a solenoid 12 that rotates the rotary valve 10 by 90 degrees around its axis.
is provided.

13 is a cap that is fitted into the left end of the rotary valve insertion hole 9 and closes the left end of the rotary valve insertion hole 9 via an O-ring 14; 15 is a partition disk 4;
A relatively small diameter through hole drilled vertically in the
Reference numerals 6 and 17 indicate orifice elbows which are screwed onto the upper and lower ends of the through hole 15 and have an orifice 18 of a constant cross-sectional area and a constant length therein, and 19 are stopper plates 20 of the upper rubber chamber 7 and the lower rubber chamber 8, respectively. and 21, with relatively high rubber protrusions 19-1, 19-1 on both ends, and three relatively low rubber protrusions protruding at equal intervals between them. It hangs with the protrusion 19-2.

Note that the orifice device is a rotary valve 10,
It consists of a solenoid 12, a through hole 15, and orifice elbows 16 and 17.

In such a structure, when the car is running at a constant speed, rolling vibration of the engine does not occur, and since the communication hole 11 of the rotary valve is oriented vertically, the upper oil chamber 5 and the lower oil chamber 6 communicate with each other through a communication hole 11 having a relatively large cross-sectional area.

Therefore, the vertical vibration of the engine is caused by the mounting screw 2,
3. Upper rubber chamber 7, lower rubber chamber 8, upper oil chamber 5,
After being gently damped through the lower oil chamber 6, the vibration is transmitted to the vehicle body, and if for some reason the amplitude of the vibration becomes relatively large, as the amplitude increases,
The rubber protrusions 19-1 at both ends first come into contact with the stopper plates 20 and 21 and are compressed, and then the rubber protrusions 1
9-2 is compressed, the deflection of the rubber chamber is 7th.
As shown in the figure, it changes linearly and absorbs large forces with little deflection.

However, when the accelerator pedal is depressed above a certain speed and the engine throttle valve opens, the engine tries to roll due to the torque reaction force, but this occurs because the accelerator pedal depression speed is above a certain value. The control device detects and sends a current to the solenoid 12.
is operated to rotate the rotary valve 10 by 90 degrees around its axis.

Then, the communication between the upper oil chamber 5 and the lower oil chamber 6 through the rotary valve 10 is cut off, and the hydraulic oil in the upper oil chamber 5 and the lower oil chamber 6 is transferred to the orifice 1 of the orifice elbows 16 and 17, respectively.
8 and 18, the rolling vibration of the engine is greatly attenuated by the hydraulic fluid flowing through the orifices 16 and 16, and then transmitted to the car body. In cooperation with the deformation of the rubber protrusion 19 described above, rolling of the engine can be prevented.

Since the rolling of the engine is attenuated in a few seconds, the solenoid 12 is activated by a circuit not shown, and by rotating the rotary valve 10 by 90 degrees, the upper oil chamber 5 and the lower oil chamber 6 are connected again to the communication hole of the rotary valve. 11, and as mentioned earlier, the roll stopper 1 gently damps engine vibrations and transmits them to the vehicle body.

According to this structure, when the engine does not generate rolling vibration, the vibration in the vertical direction is mainly transmitted to the left mount Lmt and transmission mount Mmt of engine Eng, the upper and lower rubber chambers 7,
8 and the rubber protrusion 19 to absorb it by elastic deformation, hardly transmitting the vertical vibration of the engine to the vehicle body, and when the engine tries to generate rolling vibration, the flow path resistance of the orifice 18 prevents the occurrence of rolling. This prevents the engine from colliding with other equipment in the engine compartment and the vehicle body, and also prevents pitting of the vehicle body due to engine rolling.Furthermore, since the displacement of the engine is small, the exhaust pipe extending from the engine, cooling Since the amount of displacement of the water pipe and fuel pipe is reduced, the space in the engine room can be used effectively.

In this case, instead of providing a rotary valve and an orifice elbow, an orifice is built into the rotary valve, and when the rolling vibration of the engine occurs, the rotation of the rotary valve cuts off communication between the upper and lower oil chambers, and the orifice is also installed. A structure has also been proposed in which the two oil chambers are communicated through the oil chamber.

At first glance, this seems to contribute to cost reduction, but in reality, the structure of the rotary valve becomes quite complex, which increases the cost, and as in the above embodiment, the partition disk If an orifice elbow is provided separately, the orifice diameter and length can be easily selected, processing costs can be reduced, and desired orifice characteristics can be easily obtained.

Furthermore, it is conceivable to eliminate the cap and seal the left end of the rotary valve to the rotary valve hole via an O-ring, but as in this embodiment, the rotary valve insertion hole is sealed with a cap and the rotary valve is sealed. If the portion facing the cap is tapered into a conical shape, the rotary valve becomes smaller and lighter, and the rotary valve has the advantage of being easier to position and sliding very smoothly and easily.

In short, according to the present invention, there is a partition plate that is fixed to one of the engine or the vehicle body and partitions the elastic liquid chamber into two, and a wall opposite to the partition plate of both liquid chambers formed on both sides of the partition plate. In an engine roll stopper structure having a mounting portion that is fixed to the other side of the engine or the vehicle body, an orifice that constantly communicates the two fluid chambers, and a first position provided on the partition plate that communicates the two fluid chambers. an orifice valve that is rotatable around its own axis between a second position that cuts off the communication; and an orifice valve that is integrally attached to the partition plate and that operates at a predetermined speed when the accelerator pedal is depressed or returned. The present invention is industrially extremely useful because it has a rotary solenoid mechanism that rotates directly in the above-mentioned cases, thereby providing a simple and inexpensive roll stopper structure for damping rolling vibrations of the engine.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an engine room equipped with an embodiment of the present invention, Fig. 2 is a front view of Fig. 1,
FIG. 3 is a longitudinal sectional view of the device of the above embodiment, FIG. 4 is a plan view of FIG. 3, FIG. 5 is a horizontal sectional view of the rotary valve of FIG. 3, and FIG. 6 is a - of FIG. FIG. 7 is a spring characteristic diagram showing the relationship between the deflection of the rubber chamber in FIG. 3 and the load. 1... Roll stopper, 2, 3... Mounting screw,
4... Partition disk, 5... Upper oil chamber, 6... Lower oil chamber, 7... Upper rubber chamber, 8... Lower rubber chamber, 9...
...Rotary valve insertion hole, 10...Rotary valve, 11...Communication hole, 12...Solenoid, 13
... Cap, 14 ... 0 ring, 15 ... Through hole, 16, 17 ... Orifice elbow, 18 ...
Orifice, 19, 19-1, 19-2...Rubber protrusion, 20, 21...Stopper plate, 22...
...Arm members, Eng...Engine, Frm...Frame, Frs...Front roll stopper, Lmt...
Left mount, Mmt...Mission mount,
Rrs...Rear roll stop.

Claims (1)

[Scope of utility model registration request] A partition plate that is fixed to one side of the engine or the vehicle body and partitions the elastic fluid chamber into two, and walls of both fluid chambers facing the partition plate formed on both sides of the partition plate are fixed to the other side of the engine or the vehicle body. In the engine roll stopper structure, the engine roll stopper structure has an orifice that constantly communicates the two liquid chambers, a first position provided on the partition plate that communicates the two liquid chambers, and a second position that blocks the communication. an orifice valve that is rotatable around its own axis between positions, and an orifice valve that is integrally attached to the partition plate and that directly rotates the orifice valve when the accelerator pedal is depressed or returned at a predetermined speed or higher. A roll stopper structure for an engine, characterized by having a rotary solenoid mechanism.